Molding-machine.



J. N. FRANTZL MOLDING MACHINE.

APPLICATION FILED AUG. 15. 1916.

LQWJ'ZS, Patented May 29, 1917.

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UNITE ETATES I FANT FFIG.

JEROME N. FRANTZ, 0F NEWARK, NEW JERSEY, ASSIGNOR TO THE FOUNDRY APPLI-ANGE COMPANY, OF NEWARK, NEW JERSEY, A CORPORATION OF NEW JERSEY.

MOLDING-MACHINE.

Specification of Letters Patent.

Patented May 29, 1917.

Application filed August 15, 1916. Serial No. 114,960.

To all whom it may concern:

Be it known that I, JEROME N. FRANTZ, a citizen of the United States,residing at Newark, in the county of Essex and State of New Jersey, haveinvented certain new and useful Improvements in Molding-Machines, ofwhich the following is a specification. My invention relates to moldingmachines and particularly to arrangements therein, or attachmentsthereto, adapted to facilitate the separation of the parts of the flaskand removal of the pattern from between the same. After the mold hasbeen made in the sand within the flask, it is common, after the mold hasbeen rammed up, to lift off the cope or upper half of flask by hand,then remove the' pattern plate and then lower the cope onto the drag. Inthis operation, however, great skill is required to prevent lifting thecope and pattern unevenly which is likely to injure the molded surfacein the flask. Devices are also known in which mechanical strippers areused such as those which rise from below to lift the pattern from thedrag. These are open to the objection, however, that inequalities in thesurfaces raised, or wearing of the parts, may cause the pattern to moveunevenly.

My invention is intended to overcome these difliculties and to provide asimple and effective means for'removing the pattern from the flask. Inaccordance with my invention, a supporting member is provided, havingfingers or surfaces which are adapted to eX- tend beneath pins or lugswhich extend from the side of the cope. This member is slidably mounted,or is so supported that the arms may be projected beneath the pins inthe cope or removed from beneath the same. The member is provided with ahandle and is pivotally mounted in such a manner that it may bemanipulated to cause the arms, of which there are two on each side ofthe flask, to firmly engage the pins. The member now being held firmlyby the handle, relative movement is caused between the cope, whlch isthus suspended, and the pattern and drag. After the pattern and draghave been sufficiently separated from the cope, similar fingers, orsurfaces, which may be ad uStably mounted on the member referred to, arecaused to engage in the same manner pins or lugs which extend from thesides of the pattern. Further relative movement between theflask-support and the squeezerplate at the top causes separation betweenthe suspended pattern and the drag, whereupon the pattern may be removedlaterally and the cope and drag caused to engage, inclosing thecompleted mold. Other objects of my invention reside in the combinationsof parts and improved constructions which will be more fully set forthhereinafter.

In order that a clearer understanding of my invention may be had,attention is hereby directed to the accompanying drawings forming partof this application and illustrating certain embodiments of myinvention. In the drawings Figure 1 represents a partial front elevationof a molding machine equipped with my invention, a twopart flask withinterposed pattern plate being shown therein, Fig. 2 is a verticalsection taken on line 2-2 of Fig. 1, Fig. 3 is a view similar to Fig. 2showing the cope, pattern and drag separated and Fig. 1 is a horizontalsection on line H of Fig. 3.

Referring to the drawings, the molding machine comprises a support'lcarried by a piston 2 in an air cylinder 3. The flask is carried bysupport 1 and comprises the drag 4 and cope 5 with the interposedpattern plate 6.

The two cross beams 7 7 carry the pressingor squeezing-plate 8 which isadapted to enter the 'top of the cope when the support 1 is raised, orwhen relative movement is caused between plate 8 and support 1 todecrease the distance between the same, to ram the sand in the mold.Cross-bars 7 7 are carried at an adjustable height above the floor onthe vertical arms 9 which may be pivoted below cylinder 3 to the frameof the machine so as to permit cross-bars 7 and plate 8 being swung outof the way. The construction described is common and therefore'is notillustrated fully.

The cope 5 is provided in the preferred form of my invention, with apair of outwardly extending pins 10 on each of two opposite sides andthe pattern 6 is similarly provided with a pair of outwardly extendingpins 11, 11 on each of the corresponding opposite sides. A bracket 12 ismounted upon cross-rails 7 and carries a sheave 13 provided with aratchet 1 1, a pawl 15 engaging therewith, and a handle 16. A cord 17runs over the sheave and is connected at one end to a cross piece 18,the other end of the cord being secured to the sheave.

The cross piece 18 extends across and is secured, to the upper ends of apair of cylindrical members 19 which are mounted for verticalreciprocation through bearings 20, 20 which are secured between thecrossrails 7.

Each vertical member 19 is forked at its lower end, as shown at theright in Fig. 1, and a bar 21 is pivotally mounted in each fork. Eachbar 21 has a longitudinal slot 22 therein through which extends the pin23 which is mounted in the two arms of the fork at the lower end ofmember 19. The two parallel bars 21 are each provided with a pair ofdownwardly extending portions 24 from which extend arms 25. Arms 25extend toward the front of the machine and are preferably inclined ontheir upper edges at slight upward and rearward angle, as is shown.

The vertical portions 241 are provided with a plurality of bolt openings26 through any one of which a bolt may be extended to secure a bracket27 to each arm 24, brackets27v having laterally extending arms 28parallel and similar to arms 25. A crossbar 29' connects the front endsof members 21 and is provided with a curved handle portion 30 in front.Preferably, cross bar 29 is so secured to members 21 as to give bar 29va certain amount of play, as by mounting bar 29 on screws 31 extendingoutwardly from the front ends of members I 21, bar 29 having playbetween the ends of shown in Figs. 1 and 2.

members 21 and the spaced heads or nuts 32 on bolts 31.

The operation of the device described will be readily apparent. When theflask has been filled with sand and the latter molded about the pattern33 on patternplate 6, by raising plunger 2 while pressing-plate 8presses against the upper surface of the sand in the cope, the patternseparating member will be in the position As there shown, fingers orarms. 25 are to the rear of pins 10 on the cope and slightly below thesame, while arms 28 are to the rear of pins 11 on the patternplate and afurther distance below the same. Brackets 27 carrying arms 28 are,of'course, secured to arms 2 1 at a desired distance below arms 25 inaccordance with the height of the cope and pat tern plate. Also, cord 17has been so adjusted around sheave 13 as to bring the upper surfaces ofarms 25 substantially in alinement with the bottom surfaces of pins 10.The frame 21, 24 is now drawn forward, by handle 30 until the uppersurfaces of arms 25 firmly engage the bottom surfaces of pins 10, thisbeing permitted by the pin and slot connection between arms 21 andvertical: members 19. The upper surfaces of arms 25 are preferablyinclined, as stated, to facilitate this adjustment in case there areinequalities. in the, flask members operated upon and in case ofunequalspacing of the pins 10 in different copes. Also, the bars 21 may betilted somewhat about pins 23 to permit the firm engagement of all fourpins 10 with the corresponding arms25.

The handle 30 is now held firmly in position, while air is released fromcylinder 3 to permit support 1 with the drag and pattern thereon to begently lowered, the cope being held suspended on arms 25. After asufficient lowering to disengage the pattern from the cope, pins 11 cometo rest upon arms 28, the frame 30, 21 being manipulated slightly ifrequired to cause the four pins 11 to seat evenly on arms 28. V Thesupport 1 is again lowered to its bottom position leaving the patternplate 6 suspended at a point intermediate the cope and drag, as is shownin Fig. 3, whereupon the pattern may be removed by a lateral motion. Thecope may-now be lowered upon the drag by releasing pawl 15 from ratchet1,4, while the operator holds handle 16, and; permits the same slowly torevolve.

In the preferred form of my invention I also provide means whereby thedrag may be drawn forwardly upon the support 1 of the piston 2 for thepurpose of inspecting the mold therein, and accurately replaced beneaththe cope and pattern. For this purpose, I- secure guides 3% on thesupport 1 having undercut or dove-tail guiding surfaces in which slides35, 35. are mounted. Slides extend, upwardly a slight distance aboveguides 34 and have a horizontal plate 36 integral therewith or securedthereto upon which plate the drag 41 may be mounted. Slides 35 also haveupwardly-turned extensions 37, 37 at the rear which are adapted to belocated to therear of the rear surface of the flask. A horizontal strapportion, 38 extends laterally from one of the rear extensions 37 andthen, bends forwardly at right angles, as is shown at 39. Rearextensions 37 and the side extension 39 may be provided with. inwardlydirected setscrews 40 or the liketo form accurate stops against whichthe drag may be adjusted. The slides 35. may be provided with. bentportions 11 at their extreme rear ends to act as stops to prevent slides35 being drawn side surface of the drag engaged with the side stop pin40, and it is desired to inspect the molding in the drag, slides 35 andplate 36 with the drag thereon may be drawn forwardly to overhang thesupport 1 a considerable amount, since the dove-tail engagement ofslides 35 in their guides 34 will prevent overturning of the same. Thedrag may now be accurately replaced in its former position by pushingthe slides 35 back until front portions 4-2 thereof engage pins 43.

It should be understood that my invention is not limited to the exactform of construction 'which has been particularly described, but that itis as broad as is indicated by the accompanying claims. It is obviousthat the provision of a horizontal axis about which members 21 may betilted enables arms 25 and 28 to be brought accurately into engagementwith the pins on the cope and the pattern plate regardless ofinequalities or inaccuracies in the spacing of the pins, and that theprovision of tapered upper surfaces on arms 25 also aids in brin ing thearms into firm engagement with the pins of different flasks, once theheight of the bars 21 has been approximately determined upon startingoperations with flasks of approximate uniformity. The action of myimproved devices does not depend upon the use of a particular type ofmolding machine, but may be used with .various machines in which relatvemovement may be obtained between the suspended frame 21 and the support1, either by raising and lowering the support 1 or otherwise. It shouldalso be observed that while I have described inclined surfaces on frame21 engaging pins on the cope and pattern, equivalent structure may beemployed with like effect.

Vhat I claim is:

1. In a molding machine the combination of a vertically movable support,adapted to receive a flask having a cope and drag with a pattern betweenthe same, means for raising and lowering the support, a frame, apressing plate carried thereby above the position occupied by the cope,adapted to press against the sand in the top of the cope when thesupport is raised, and a member mounted on said frame having supportingprojections adapted to engage under lugs on the cope, and projectionspositioned to engage under lugs on the pattern when the latter and thedrag are lowered partway beneath the suspended cope, said member beingmounted to permit lateral movement thereof, to position said projectionsbeneath the lugs and to remove them from beneath the same, substantiallyas set forth.

2. In a molding machine the combination of a support, a flask having acope and drag with a pattern between the same adapted to be supported onsaid support, said cope and pattern having laterally-extending lugsthereon, a frame, a pressing plate carried thereby above the cope, meansfor causing relative movement between said support and plate, toincrease and decrease the distance between the same, and a membermounted relatively to said plate, having supporting projections adaptedto engage under lugs on the cope, and projections positioned to engageunder lugs on the pattern after separating movement between said supportand plate has separated the suspended cope from the pattern and drag,said member being supported to permit lateral movement thereof, toposition said projections beneath the lugs and to remove them frombeneath the same, substantially as set forth.

3. In a molding machine the combination of a frame, a vertical supportthereon, a pair of horizontally extending members suspended from saidsupport by pin and slot connections, adapted to permit lengthwisemovement of said members and pivotal movement thereof, a support adaptedto receive a flask having a cope and drag with pattern between the same,said members positioned to extend on opposite sides of the flask, andvertical extensions on said members having portions adapted to extendunder lugs on the cope, and also on the pattern, said members beinglengthwise movable sufliciently to remove said portions from under saidlugs, substantially as set forth.

4. In a molding machine the combination of a frame, a vertical supportthereon, a pair of horizontally extending members suspended from saidsupport by pin and slot connections, adapted to permit lengthwisemovement of said members and pivotal movement thereof, a support adaptedto receive a fiask having a cope and drag with pattern between the same,said members positioned to extend on opposite sides of the flask,vertical extensions on said members having arms adapted to extend undera pair of lugs on each side of the cope, brackets adapted to be securedto said extensions having arms adapted to extend under a pair of lugs oneach side of the pattern, and means for securing said brackets indesired adjusted positions on said extensions, said members beingmovable lengthwise sufliciently to remove all said arms from under saidlugs, substantially as set forth.

5. In a molding machine having a support, adapted to support a flaskhaving a cope and drag with a pattern between the same, the combinationof a cross member positioned to extendabove the flask, a sheave thereon,a flexible connection about the sheave, and extending downwardlytherefrom, a frame comprising a pair of horizon tally extending memberspositioned to extend, one on each side the flask, suspended from saidconnection, said frame having a handle in front and vertically spacedpor tions adapted to extend under lugs on the cope and pattern,substantially as set forth.

6. In a molding machine having a support, adapted to support a flaskhaving a cope and drag with a pattern between the same, the combinationof a cross member positioned to extend above the flask, a Verticallymovable frame suspended from the cross member, a pair of horizontallyextending members positioned to extend, one on each side the flask,secured to said frame by pin and slot connections, and forwardlyextending arms on said members, adapted to extend under a pair of pinson each side of the cope and the pattern, said arms having inclinedupper surfaces, substantially as set forth.

7 In a molding machine, the combination of a support, a flask having acope and drag with a pattern between the same, adapted to be supportedon said support, said cope and pattern having laterally extending pinsthereon, a cross member above the flask, a frame comprising a pair ofhorizontally extending members, one on each side the flask, suspendedfrom the cross member by a connection permitting tilting of the frameabout a horizontal axis, arms on the frame adaptedto extend under a pairof said pins on each side the cope, and other arms on the framepositioned to extend under a pair of said pins on each side the pattern,the vertical distance between the two sets of arms being greater thanthat between the pins on the cope and pattern, substantially assetforth.

8. In a molding machine, the combination of a Vertically rec'iprocablesupport, guides thereon, a plate adapted to receive a flask, havingportions slidably mounted in said guides, upwardly-turned rearextensions on said portions, and a horizontal strap portion extendinglaterally from one of said rear extensions and then forwardly at rightangles, said rear extensions and strap portions being adapted, to beengaged by the rear and side of a flask on said plate, when the flask ismoved against the same, substantially as set forth.

This specification signed and witnessed this 9th day of August, 1916.

JEROME N. FRANTZ.

Witnesses:

DYER SMITH, WILLIAM I-IIMMELREIOH.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, I). G.

